<!DOCTYPE html>
<html lang="en">

  <head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>word-break</title>
  </head>
  <style>
    .content {
      width: 200px;
      background-color: pink;
      word-break: break-all;
    }
  </style>

  <body>

    <div class="content">
      ssssssssssssssssssssssssssssssssssssssssssssssssssssssssssssss
    </div>
  </body>

</html>